Annotation of /trunk/finley/src/CPPAdapter/MeshAdapter.h

A bunch of changes related to saveDataCSV.
[Not completed or unit tested yet]
Added saveDataCSV to util.py
AbstractDomain (and MeshAdapter) have a commonFunctionSpace method to
take a group of FunctionSpaces and return something they can all be interpolated to.
Added pointToStream() in DataTypes to help print points.
added actsConstant() to data - required because DataConstant doesn't store samples the same way other Data do.